Old PSU cable not found on new PSU

[felipealvarezv117]

I have recently bought a new PSU for a computer and it seems like the old PSU had one cable that the new one does not have. The old PSU was HP Power Supply with the model number PC9057 that came with the HP Compaq 6200. The new PSU is a EVGA 600 B1 and I can't seem to find a cable that fits the six little pins on the motherboard. Below are some pictures:

Old PSU Cable:
https://i.imgur.com/xkQhqry.jpg
https://i.imgur.com/UCa58sP.jpg

Where old PSU cable was connected:
https://i.imgur.com/u9Hf8GM.jpg

 

[the nerd 389]

Welcome to the wonderful world of proprietary OEM power connectors. You could try to find a PSU with a matching connector, but it's quite difficult and most are terrible quality.

Alternatively, you could measure the voltages on the pins of that connector and solder them to appropriate wires on the new PSU. I may be able to find a pinout diagram for that connector to help with this.

Generally, though, proprietary connectors mean that you can't easily replace OEM PSUs. Some OEM boards are even known to burst into flames when you try (and don't pay attention to the pinout).

Update: That connector is evading my efforts to locate a pinout diagram so far. Are you sure it's a Dell PSU in an HP machine? That would be incredibly unusual and indicative of a very suspicious repair job.

Even the service manual neglects this connector, but it appears to be what they use in place of the 24-pin ATX connector. That means that at least one pin is PS_ON, and another is 5VSB. Those can be a pain to identify.

 

[felipealvarezv117]

@the nerd 389 My mistake, not sure why I put Dell there. It is in fact an HP PSU, with the model number PC9057

 

[the nerd 389]

@the nerd 389 My mistake, not sure why I put Dell there. It is in fact an HP PSU, with the model number PC9057

In that case, you'll need a multimeter, some wire strippers, a soldering iron, the ATX pinout, and some time to get it working. An oscilloscope would be highly recommended as well.

I can't give you exact instructions as the connector is proprietary and there aren't any pinout diagrams around for it. I'd have to have it in front of me to give you any more specific advice on getting it working again.

On a somewhat separate note, that computer is quite old. I would honestly recommend replacing it over attempting a repair or retrofit. OEM power supplies are a genuine pain to replace, and I don't think I've met anyone who successfully replaced one in practice. Most smaller repair shops would turn you away if you asked them to replace that PSU with your EVGA. Only some of the more experienced, larger shops would consider it.

 

[felipealvarezv117]

@the nerd 389 My mistake, not sure why I put Dell there. It is in fact an HP PSU, with the model number PC9057

In that case, you'll need a multimeter, some wire strippers, a soldering iron, the ATX pinout, and some time to get it working. An oscilloscope would be highly recommended as well.

I can't give you exact instructions as the connector is proprietary and there aren't any pinout diagrams around for it. I'd have to have it in front of me to give you any more specific advice on getting it working again.

On a somewhat separate note, that computer is quite old. I would honestly recommend replacing it over attempting a repair or retrofit. OEM power supplies are a genuine pain to replace, and I don't think I've met anyone who successfully replaced one in practice. Most smaller repair shops would turn you away if you asked them to replace that PSU with your EVGA. Only some of the more experienced, larger shops would consider it.

I was reading up on other threads elsewhere and I came across this:
https://www.reddit.com/r/techsupport/comments/99pdgh/upgrading_proprietary_hp_psu_hp_compaq_6200_pro/

Would the adapter work by any chance or is it not worth risking, and it would be a better idea to find a new PSU or just buy a new build?

 

[the nerd 389]

Nice find! I didn't consider moddiy. That adapter checks out as far as I can tell. Moddiy is pretty good about their cables, so I'd trust it.

I would still recommend replacing the machine when you can, though, as OEM systems like that have quite a few issues once you start replacing parts or upgrading. Until then, the adapter should work fine.